Why does H^+ ion always get associated w...

Why does `H^+` ion always get associated with other atoms or molecules?

Ionisation enthalpy of hydrogen resembles that of alkali metals.

Its resembles is similar to halogens

It resembles both alkali metals and halogens

Loss of an electron from hydrogen atom results in a nucleus of very small size as compared to other atoms or ions. Due to small size , it cannot exist free.

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